GameScope: Force DXVK_HDR=1 if GameScope HDR is enabled

If DXVK_HDR is disabled, GameScope will still be unable to use HDR.
We should assume if GameScope HDR is enabled that a user also wants
HDR enabled from the DXVK side. There should be no reason to pass
--hdr-enabled to GameScope if you don't actually want to use HDR.

Fixes #1103.

steamtinkerlaunch

@@ -7,7 +7,7 @@
 PREFIX="/usr"
 PROGNAME="SteamTinkerLaunch"
 NICEPROGNAME="Steam Tinker Launch"
-PROGVERS="v14.0.20240503-2"
+PROGVERS="v14.0.20240512-1"
 PROGCMD="${0##*/}"
 PROGINTERNALPROTNAME="Proton-stl"
 SHOSTL="stl"
@@ -11731,7 +11731,13 @@ function GameScopeGui {
 						## FILTERING OPTIONS END ###
 
 						### HDR OPTIONS ###
-						if [ "$GSHDR" == "TRUE" ]                                       ; then  GAMESCOPE_ARGS="${GAMESCOPE_ARGS} --hdr-enabled"; fi  # Possible to check if any HDR displays available and warn if not?
+						# Possible to check if any HDR displays available and warn if not?
+						if [ "$GSHDR" == "TRUE" ]; then
+							GAMESCOPE_ARGS="${GAMESCOPE_ARGS} --hdr-enabled";
+
+							writelog "INFO" "${FUNCNAME[0]} - GameScope HDR enabled, forcing DXVK_HDR=1"
+							export DXVK_HDR=1
+						fi
 						if [ "$GSHDRWGFS" == "TRUE" ]; then
 							# Don't enable GSHDRWGFS if GSHDR is not enabled first
 							if [ "$GSHDR" == "TRUE" ]; then